<template>
    <div>
        <div class="search">
            <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
        </div>
        <div class="search-content" ref="search" v-show="keyword">
            <ul>
                <li 
                class="search-item border-bottom" 
                v-for="item of list" 
                :key="item.id"
                @click="handleCityClick(item.name)">
                    {{item.name}}
                </li>
                <li class="search-item border-bottom" v-show="hasNoData">
                    没有找到匹配数据
                </li>
            </ul>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapMutations} from 'vuex'
export default {
    name:'CitySearch',
    props:{
        cities:Object
    },
    data(){
        return{
            keyword:'',
            list:[],
            timer:null
        }
    },
    computed:{
        hasNoData(){
            return !this.list.length
        }
    },
    watch:{
        keyword(){
            if(this.timer){
                clearTimeout(this.timer)
            }
            if(!this.keyword){
                this.list=[]
                return 
            }
            this.timer=setTimeout(()=>{
                const result=[]
                for(let i in this.cities){
                    this.cities[i].forEach((value) => {
                        if(value.spell.indexOf(this.keyword) > -1 ||
                           value.name.indexOf(this.keyword) > -1){
                           result.push(value)
                        }
                    })
                }
                this.list=result
            },100)
        }
    },
    methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted(){
        this.scroll=new Bscroll(this.$refs.search)
    }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.search
  height .72rem
  padding 0 .1rem
  background $bgColor
  .search-input
    box-sizing border-box
    width 100%
    height .62rem
    padding 0 .1rem
    line-height .62rem
    text-align center
    border-radius .06rem
    color #666
.search-content
  z-index 1
  overflow hidden
  position absolute
  top 1.58rem
  left 0
  right 0
  bottom 0
  background #eee
  .search-item
    line-height .62rem
    padding-left .2rem
    background #fff
    color #666
</style>